Caster Racing EX1.5R Buggy – Build

I ran out of parts in Bag D, Time for Bag E

The Caster EX1.5R uses a pivot ball front suspension design.

This is the steering knuckle that carries the front CVD. You’ll notice the pivot balls already in place.

You’ll notice one of these pivot balls has a collar, and the other does not. The collared pivot ball came stock with the EX1.5R. It came with 4 just like that. However, it has been widely reported that the lower pivot ball pulls out of the threads in the lower control arm. therefore, this very common fix came into play. That is actually a Thunder Tiger Pivot ball (part #1863). It doesn’t have a collar, and the threads are a couple of millimeters longer than stock. This gives you the ability to thread it further into the arm, while still having the full adjust-ability of stock.

There are metal caps that cover over the pivot ball to prevent it from coming out. It also serves as the outside of the ball socket where the pivot ball operates.

These are threaded in, the hole on the end is a hex for an allen wrench.

The CVD gets a bearing before being inserted into the steering knuckle.

Item of note: There is a small grub screw here in the CVD. You want to make sure you pull it out, and throw some Loctite on it before you go any further. Trust me.

The drive pin will go in here…

The Wheel Hub slides on, make sure you line up the holes for the drive pin.

There is a set screw inside the wheel hub to hold the drive pin in place. I threw a drop of Loctite on the screw.

Time to thread the pivot balls into the A Arms.

Now for the uppers

The completed front suspension

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3 Responses to “Caster Racing EX1.5R Buggy – Build”

  1. […] out our build article of the Caster Racing EX1.5R! Stay tuned for our initial review, and our long term review as we […]

  2. rick jenkins says:

    great wright up. Cars will be coming with clear bodies soon and also I’m hoping new captured cvd’s. FYI,also we just found out about the side guards not fitting correct and we have fixed problem

    Rick Jenkins
    Caster racing USA team manager

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